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Rochelle salt is a ferroelectric material. | |
A. | TRUE [Correct Answer] |
B. | FALSE [Wrong Answer] |
View Answer
Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Which of these instruments has highest power consumption?
Dynamometer
Electrostatic
Moving coil
Hot wire
⇒ The current I in the circuit show
- j1 A
j1 A
0
20 A
⇒ In figure the current through resist
is always equal to 130 mA
may vary between 130 mA and 10 mA
may vary between 65 mA and 10 mA
is always equal to 65 mA
⇒
A-1, B-2, C-3, D-4
A-2, B-3, C-4, D-1
A-3, B-1, C-4, D-3
A-4, B-1, C-3, D-2
⇒
A-4, B-2, C-3, D-1
A-2, B-4, C-1, D-3
A-2, B-4, C-3, D-1
A-4, B-2, C-1, D-3
⇒ PIL colour picture tube has the main advantage that
it is cheap
it ensures purity in colour
it is self convergent
both (a) and (b)
⇒ Identify which of the following is not a tree of the graph shown in fi
bcgh
defg
abfg
aegh
⇒ A modem is
a form of commutator
a device for digitizing speech
a circuit used for suppressing microwave mterference
an electronic circuit which carries out modulation and demodulation of a carrier frequency
⇒ A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at s = - 2 and s = - 4, and one simple zero at s = - 1. A unit step u(t) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is
[exp (- 2t) + exp (-4t)] u(t)
[-4 exp (- 2t) + 12 exp (-4t) - exp (-t)] u(t)
[-4 exp (- 2t) + 12 exp (-4t)] u(t)
[-0.5 exp (- 2t) + 1.5 exp (-4t)] u(t)
⇒ In a number system with radix r, the decimal value of 110 is equal to 4r. The decimal values of 111 and r respective are equal to
20, 5
16, 4
13, 3
8, 2
⇒ In a digital voltmeter the oscillator frequency is 400 kHz and the ramp voltage falls from 8 V to 0 V in 20 ms. What is the number of pulses counted by the counter?
800
2000
4000
8000
⇒ Pre-emphasis circuit is used
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before modulation
before detection
after detection
⇒ In a travelling wave tube distributed interaction between an electron beam and a travelling wave takes place
TRUE
FALSE
⇒ In the circuit of figure, the source supplies, 2.25 mA. The value of R mus
5 Ω
3 Ω
1.5 Ω
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⇒ In communication systems the frequency range used for voice is
15 Hz to 150 Hz
30 Hz to 1000 Hz
100 Hz to 1500 Hz
300 Hz to 3800 Hz
⇒ The logic operations of the two circuits given below
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⇒ Which of the following READ statements is correct in FORTRAN 77?
⇒ A class E chopper
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can operate in first or third quadrant
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Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true
⇒
A-1, B-2, C-3
A-3, B-1, C-2
A-2, B-1, C-3
A-3, B-1, C-2
⇒ An n channel depletion type MOSFET has
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highly doped p substrate and highly doped n source and drain
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lightly doped n substrate and highly doped n source and drain
⇒ A pair of 21114s can store __________ words of __________ bits each.
2114, 8
1024, 8
4228, 16
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⇒ In MF range, increasing the transmitter power
increases the range of transmitter
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increases the range of transmitter because propagation is through space waves
⇒ In a class C operation V_{CC} = 30 V and V_{CE(sat)} = 2 V. The efficiency is
0.9375
0.88
0.0666
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⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived
EB596
CD231
DA495
25B6A
⇒ A speech signal, band limited to 4kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. The number of quantization levels required to reduce the quantization noise by a factor of 4 would be
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⇒ The Fourier series of a real periodic function has only
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T = 0.693 RC
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⇒ Which of the following amplifiers is used for impedance matching?
CE
CC
CB
Push pull
⇒ The internal impedance of a source is 3 + j 7 Ω. For maximum power transfer, load impedance should be
3 + j 7 Ω
3 - j 7 Ω
7 + j 3 Ω
7 - j 3 Ω
⇒ Which of these instruments has highest power consumption?
Dynamometer
Electrostatic
Moving coil
Hot wire
⇒ The current I in the circuit show
- j1 A
j1 A
0
20 A
⇒ In figure the current through resist
is always equal to 130 mA
may vary between 130 mA and 10 mA
may vary between 65 mA and 10 mA
is always equal to 65 mA
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | Ternary | 1. | 0, 1, 3 |
B. | Quaternary | 2. | 0, 1, 2, 3, 4, 5, 6 7, 8, 9, A, B |
C. | Quinary | 3. | 0, 1, 2, 3, 4 |
D. | Duodecimal | 4. | 0, 1, 2 |
A-1, B-2, C-3, D-4
A-2, B-3, C-4, D-1
A-3, B-1, C-4, D-3
A-4, B-1, C-3, D-2
⇒
Match the following:
List I (Antenna) | List II (Communication system) | ||
---|---|---|---|
A. | Turnstile | 1. | Radar |
B. | Yagi | 2. | TV transmission |
C. | Dish | 3. | MW broadcasting |
D. | Vertical mast | 4. | TV reception |
A-4, B-2, C-3, D-1
A-2, B-4, C-1, D-3
A-2, B-4, C-3, D-1
A-4, B-2, C-1, D-3
⇒ PIL colour picture tube has the main advantage that
it is cheap
it ensures purity in colour
it is self convergent
both (a) and (b)
⇒ Identify which of the following is not a tree of the graph shown in fi
bcgh
defg
abfg
aegh
⇒ A modem is
a form of commutator
a device for digitizing speech
a circuit used for suppressing microwave mterference
an electronic circuit which carries out modulation and demodulation of a carrier frequency
⇒ A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at s = - 2 and s = - 4, and one simple zero at s = - 1. A unit step u(t) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is
[exp (- 2t) + exp (-4t)] u(t)
[-4 exp (- 2t) + 12 exp (-4t) - exp (-t)] u(t)
[-4 exp (- 2t) + 12 exp (-4t)] u(t)
[-0.5 exp (- 2t) + 1.5 exp (-4t)] u(t)
⇒ In a number system with radix r, the decimal value of 110 is equal to 4r. The decimal values of 111 and r respective are equal to
20, 5
16, 4
13, 3
8, 2
⇒ In a digital voltmeter the oscillator frequency is 400 kHz and the ramp voltage falls from 8 V to 0 V in 20 ms. What is the number of pulses counted by the counter?
800
2000
4000
8000
⇒ Pre-emphasis circuit is used
after modulation
before modulation
before detection
after detection
⇒ In a travelling wave tube distributed interaction between an electron beam and a travelling wave takes place
TRUE
FALSE
⇒ In the circuit of figure, the source supplies, 2.25 mA. The value of R mus
5 Ω
3 Ω
1.5 Ω
0.5 Ω
⇒ In communication systems the frequency range used for voice is
15 Hz to 150 Hz
30 Hz to 1000 Hz
100 Hz to 1500 Hz
300 Hz to 3800 Hz
⇒ The logic operations of the two circuits given below
complementary
identical
entirely different
none of these
⇒ Which of the following READ statements is correct in FORTRAN 77?
READ *, HONEY (I), I = 1, 5
READ *, (HONEY (I), I = 1, 5)
READ * HONEY I, I = 1, 5
READ HONEY I, I = 1, 5
⇒ A class E chopper
can operate in second quadrant only
can operate in first or third quadrant
can operate in all the four quadrants
can operate in either second or third quadrant
⇒
Assertion (A): Ferrites are very useful at very high frequencies.
Reason (R): Ferrites have high permeability and high resistivity.
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true
⇒
Match the following:
List I (Double Rectifier) | List II (Number of Diodes) | ||
---|---|---|---|
A. | Full wave Bridge rectifier | 1. | 1 |
B. | Half wave rectifier | 2. | 2 |
C. | Full wave rectifier using centre tapped transformer | 3. | 4 |
A-1, B-2, C-3
A-3, B-1, C-2
A-2, B-1, C-3
A-3, B-1, C-2
⇒ An n channel depletion type MOSFET has
lightly doped p substrate and highly doped n source and drain
highly doped p substrate and highly doped n source and drain
highly doped p substrate and lightly doped n source and drain
lightly doped n substrate and highly doped n source and drain
⇒ A pair of 21114s can store __________ words of __________ bits each.
2114, 8
1024, 8
4228, 16
2114, 16
⇒ In MF range, increasing the transmitter power
increases the range of transmitter
does not increase the range of transmitter because propagation is limited by tilt
decreases the range of transmitter because propagation is limited by tilt
increases the range of transmitter because propagation is through space waves
⇒ In a class C operation V_{CC} = 30 V and V_{CE(sat)} = 2 V. The efficiency is
0.9375
0.88
0.0666
0.0333
⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived
EB596
CD231
DA495
25B6A
⇒ A speech signal, band limited to 4kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. The number of quantization levels required to reduce the quantization noise by a factor of 4 would be
1024
512
256
64
⇒ The Fourier series of a real periodic function has only
- Cosine terms if it is even
- Sine terms if it is even
- Cosine terms if it is odd
- Sine terms if it is odd
(1) and (4)
(1) and (2)
(2) and (4)
(2) and (3)
⇒ The gate width of a monostable multivibrator is given by
T = 1.1 RC
T = 0.693 RC
0.963 RC
T = 0.369 RC
⇒ Which of the following amplifiers is used for impedance matching?
CE
CC
CB
Push pull
⇒ The internal impedance of a source is 3 + j 7 Ω. For maximum power transfer, load impedance should be
3 + j 7 Ω
3 - j 7 Ω
7 + j 3 Ω
7 - j 3 Ω